We’re your partner
for bespoke software solutions


Problems cannot be solved with
the same mind set that created them.
A. Einstein

We look at your situation from a different perspective and find a holistic, customer-centric approach that works for your business.


The best way to stay consistent
is to change with the circumstances.
W. Churchill

We develop bespoke productivity solutions that fit your environment, using modern technology and agile methods.

Professional Service

Give a man a fish, you feed him for a day.
Teach a man to fish, you feed him for life.

We support your IT team’s development to prepare them for future challenges.


Some examples of our work
(Click on pictures for details)

Customised eBay Connector

Consulting + Development + Prof. Service

Flexible Multi­Channel Connector

Software Development

Individual Dropshipping Solution

Consulting + Development + Prof. Service

TecDoc Catalogue Connector

Software Development

Audit for Secondhand Goods

Software Development


What our customers say about us


Let’s introduce ourselves

Who we are and what we do

At consultant-base, we come to work every day because we’re passionate about creating software solutions targeting the vulnerable spots in business processes.

Companies grow and so do their processes and software, but unfortunately not always in the right direction. This leads to complicated and lengthy processes in daily operations, unsatisfied employees and customers, and ultimately resulting in loss of sales.
We at consultant-base help our clients to look at the situation from a different perspective and find a holistic, customer-centred approach in order to create an overall process that works for their business.

As a small, agile and experienced team we offer an end-to-end service from consulting, to software development and to rollout. We don’t just build software and leave you alone with it – we support our clients on a long-term basis and even help them to develop their own experienced IT team.

Our Main focus

As a Sage ISV Champion / Developer Partner we are experts in customising Sage 100 / Sage Office Line.
We are a Microsoft Partner, specialising in Microsoft business products like SQL-Server and .NET development.

Our Values

We build long-standing relationships with our customers. We work together, listen and add value. The success of our customers is our success. Transparency and honesty are important to us. We are passionate about our work and we go the extra mile to achieve excellence.


Meet our Network


Our Highlights

  • 2009

    consultant-base is born

    consultant-base was founded by Andrea and Robert Lener, who shared a vision of creating a customer-centred software company.

  • 2011

    Individual eBay Connector

    Working together with a client’s IT team, we created a software connector for eBay to handle listing and sales. It was a big challenge and a huge success for our team.

  • 2012

    MultiChannel Connector

    Building upon our successful development of a software connector for eBay, and after receiving numerous requests from clients, we built a multichannel connector handling listings and sales on other platforms.

  • 2014

    Move to MVIC

    Driven by the idea of connecting and exchanging ideas with other brilliant IT companies, we moved our office to the Mountain View Innovation Centre.

  • 2015

    Individual Dropshipping Solution

    Working closely with a client’s purchasing department, we optimised their procurement process and built a tailor-made dropshipping solution that could handle thousands of orders.

  • 2017

    Team Development

    To ensure our clients are prepared for digital transformation, we provide expert support for the training and development of IT teams.

  • 2019

    10 Years consultant-base

    Celebrating 10 Years in business, we’d like to thank all our clients, friends and supports!

  • Be Part
    Of Our

Our Amazing Team

Meet the core team

Andrea Lener

Development (+ Consulting)

Andrea started her software career in the early 2000s, developing web shops and ecommerce applications while studying media technology and design at the university of applied sciences Hagenberg in Austria. She finished university with a MSc in Engineering.

Developing software connecting eBay to an OpenSource Webshop, she was awarded «Best Student Developer» in eBay’s developer contest in 2006. Presenting the solution at eBayLIVE in Cologne, she started working in the industry, designing and delivering web- and desktop-based software solutions in close cooperation with clients in the ecommerce environment.

Driven by her dream of offering innovative and flexible solutions with a more customer-centric approach, she founded consultant-base ltd in 2009.

Andrea is committed to the continuous improvement of project and development practices and is an Agile enthusiast. If she is not in the office, you’ll most likely find her on the sea or at the seaside, engaging in outdoor activities, travelling the world or cooking delicious meals for family and friends.

Robert Lener (née Holzmüller)

Consulting (+ Development)

In his teens, Robert discovered his first computer on a skip, brought it back to life and started to learn programming. Upon reaching legal age, he started an IT system company, supplying local authorities and businesses with hardware, network solutions and bespoke software.

Robert has worked across a number of industries, helping over 50 companies to become competitive ecommerce players and successfully supporting them with bespoke software and strategic consulting. He graduated with a degree in Business Economics in 2006

Combining his experience and skills in consulting IT and economics from the past 15 years, he started up consultant-base ltd. in 2009

Robert is a keen analyst, eager to get to the bottom of every issue and find the optimal solution, frequently thinking out of the box. In his spare time, Robert loves adventures on land or sea, experiencing foreign countries and cultures.


consultant-base Ltd.

3 Premier Court
Mooragh Promenade
Ramsey - Isle of Man

Phone DE: +49 8571-9823910

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